1. A Dermatologist's Perspective on Vitamin D
Veena Vanchinathan, MD, Henry W. Lim, MD 
Mayo Clinic Proceedings 
Volume 87, Issue 4, Pages (April 2012)
DOI: /j.mayocp
Copyright © 2012 Mayo Foundation for Medical Education and Research Terms and Conditions

2. FIGURE 1 Photobiosynthesis of vitamin D.1-9,11,12
Mayo Clinic Proceedings  , DOI: ( /j.mayocp )
Copyright © 2012 Mayo Foundation for Medical Education and Research Terms and Conditions

3. FIGURE 2
Structure of human skin. 7-Dehydrocholesterol is converted to previtamin D3 in the basal (stratum basale) and suprabasal layers of the epidermis of the skin.1-9,11,12
Mayo Clinic Proceedings  , DOI: ( /j.mayocp )
Copyright © 2012 Mayo Foundation for Medical Education and Research Terms and Conditions